Stacked Icons

icon-user-md on icon-check-empty
icon-user-md on icon-circle
icon-user-mdl on icon-sign-blank
icon-ban-circle on icon-user-md

To stack multiple icons, use the icon-stack class on the parent, the icon-light
for the regularly sized icon, and icon-stack-base for the larger icon. icon-light
can be used as an alternative icon color. You can even throw larger icon classes on the parent
to get further control of sizing.